ROBERTS: Are you prepared to take the oath, Senator? OBAMA: I am. ROBERTS: I, Barack Hussein Obama... OBAMA: I, Barack... ROBERTS: ... do solemnly swear... OBAMA: I, Barack Hussein Obama, do solemnly swear... ROBERTS: ... that I will execute the office of president to the United States faithfully... OBAMA: ... that I will execute... ROBERTS: ... faithfully the office of president of the United States... OBAMA: ... the office of president of the United States faithfully... ROBERTS: ... and will to the best of my ability... OBAMA: ... and will to the best of my ability... ROBERTS: ... preserve, protect and defend the Constitution of the United States. OBAMA: ... preserve, protect and defend the Constitution of the United States. ROBERTS: So help you God? OBAMA: So help me God. ROBERTS: Congratulations, Mr. President.